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Finding the Fourth Proportional to 1,123.06, 1,549.65 and 625.70

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Solution

The fourth proportional to 1,123.06, 1,549.65 and 625.70 is: 863.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.06 : 1,549.65 = 625.70 : x
  2. Step 2: Convert to fraction form
    1,123.06/1,549.65 = 625.70/x
  3. Step 3: Cross multiply
    1,123.06x = 1,549.65 × 625.70
  4. Step 4: Simplify right side
    1,123.06x = 969,616.01
  5. Step 5: Solve for x
    x = 969,616.01/1,123.06
  6. Step 6: Final answer
    x = 863.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.